Star clusters are fundamental units of stellar feedback and unique tracers of their host galactic properties. In this review, we will first focus on their constituents, i.e. detailed insight into their stellar populations and their surrounding ionised, warm, neutral, and molecular gas. We, then, move beyond the Local Group to review star cluster populations at various evolutionary stages, and in diverse galactic environmental conditions accessible in the local Universe. At high redshift, where conditions for cluster formation and evolution are more extreme, we are only able to observe the integrated light of a handful of objects that we believe will become globular clusters. We therefore discuss how numerical and analytical methods, informed by the observed properties of cluster populations in the local Universe, are used to develop sophisticated simulations potentially capable of disentangling the genetic map of galaxy formation and assembly that is carried by globular cluster populations.

中文翻译：

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远近星团

星团是恒星反馈的基本单位，也是其宿主星系特性的独特示踪剂。在这篇综述中，我们将首先关注它们的成分，即详细了解它们的恒星群及其周围的电离、温暖、中性和分子气体。然后，我们将超越本地组，在不同的进化阶段以及本地宇宙中可访问的不同星系环境条件下审查星团种群。在高红移下，星团形成和演化的条件更加极端，我们只能观察到少数我们认为将成为球状星团的物体的综合光。因此，我们讨论了数值和分析方法，根据观察到的局部宇宙中星团种群的特性，